1.Many students find ____difficult to learn.
问题描述：
1.Many students find ____difficult to learn.
Many students find ____ language difficult to learn.
A.English B.an English C.the English D.England
2.The workers ______a new hospital since the end of last year.
The workers ______a new hospital by the end of last year.
A.have built B.have been building C.had built D.were building
答
1 A（英语这们学科） C（ language 表示一国语言上前面一般要加the）
2 B（since后加过去的时间点,用完成时,这个句子中意思是,自从去年年底,这些工人一直在修新医院,所以现在完成进行时比较合适）
C（by the end of 一般用于完成时,考虑中时间是去年,所以用过去完成时）